The AT&T extended multimedia interface (EMMI) is being tested for applicability to wide area network access. Two EMMI units are used. One in the ultrasound examination room is connected to the National Television Standards Committee (NTSC) output of the ultrasound modality and audio communication equipment for the technologist. The other in the ultrasound reading room is connected to a NTSC monitor and audio communication equipment for the radiologist. The EMMIs are interconnected via an ATM permanent virtual circuit that establishes a connection between an ultrasound technologist and radiologist during a procedure. The test monitors 3 items: (1) How often can ultrasound studies be completed by a radiologist without on-site intervention, i.e., by viewing remotely only? (2) How often and on which exam does a technologist require direction remotely from a radiologist to complete a study? (3) How often and which exams require the radiologist to go to the ultrasound examination room to complete the study?